Utility for getting a list of free domains of given length and top level domain.

get-free-domains --length LENGTH
                 --tld TLD
                 [--nameserver [NAMESERVER ...]]
                 [--file FILE]
                 [--prefix PREFIX]
                 [--threads THREADS]

Arguments with '*' are required, the others optional.

main.py --length 3 --tld foo --threads 50 --file foo.txt

produces the file foo.txt which contains all most probably free TLD .foo domains with a length of 3 characters with 50 threads.

All combinations from aaa.foo to zzz.foo will be sent to the nameservers.

There will be very likely false positives without DNS entries but WHOIS entries, especially when using very short length.